216925256 has 16 divisors (see below), whose sum is σ = 408186540. Its totient is φ = 108075520.

The previous prime is 216925199. The next prime is 216925277. The reversal of 216925256 is 652529612.

It can be written as a sum of positive squares in 2 ways, for example, as 208340356 + 8584900 = 14434^2 + 2930^2 .

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46001 + ... + 50496.

Almost surely, 2^216925256 is an apocalyptic number.

It is an amenable number.

216925256 is a deficient number, since it is larger than the sum of its proper divisors (191261284).

216925256 is a wasteful number, since it uses less digits than its factorization.

216925256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96784 (or 96780 counting only the distinct ones).

The product of its digits is 64800, while the sum is 38.

The square root of 216925256 is about 14728.3826674893. The cubic root of 216925256 is about 600.8554981437.

The spelling of 216925256 in words is "two hundred sixteen million, nine hundred twenty-five thousand, two hundred fifty-six".